﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class jianfa:sgu
    {
        public override void jisuan()
        {
            int a = this.Num- this.Num2;
            Console.WriteLine(a);
        }
    }
}
